John b



(No Model.)

J. B. WARING. ORE GONOENTRATOR.

.No. 556,567.- Patented Mar. 17, 1896.

WITNESSES: MAM

M. PHOTO-UTNQWAQWNGTDNJ C UNITED STATES PATENT ()EEICE.

JOHN B. \VARING, OF NEW YORK, N. Y.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 556,567, dated March17, 1896.

Application filed. January 24, 1894. Serial No. 497,949. (NO model.)

To all whom it floaty concern.-

Be it known that I, JOHN B. WARING, of the city, county, and State ofNew York, have invented a certain new and useful Improvement inOre-Concentrators, of which the following is a specification.

I will describe a machine embodying my improvement and then point outthe novel features in the claims.

In the accompanying drawings, Figure 1 is a central vertical section ofan ore-concentrator embodying my improvement. Fig. 2 is a horizontalsection, as indicated by the line 2 2, Fig. 1. 7

Similar letters of reference designate corresponding parts in both thefigures.

A designates a concentrating-chamber of circular form and having, ashere shown, a cylindric lower portion a, which is open at both ends, anacutely or abruptly flaring portion a extending from the upper end ofthe cylindric portion a and a less acutely-flaring portion a surmountingthe acutely-flaring portion a The upper end of the chamber is entirelyopen. The lower part, a, of the acutely-flaring portion a may beperfectly smooth on its upper surfaces, as shown in Fig. 1, but theupper part, a of the acutelyfiaring portion a is provided on its uppersurfaces with circular grooves or riffles a. In the interior of the lessacutely-flaring portion a are a number of comparatively deep grooves M.The grooves or riffles a preferably have flat bottoms a very slightlyinclined downwardly toward the center of the chamber, and sides or backsa extended at right angles to the bottoms a and consequently inclinedupwardly toward the center of the chamber. This shape I deemadvantageous.

The grooves a" are shown as having their bottoms 0. extended at quite asharp angle downwardly toward the center of the chamber. This feature isimportant. The sides or backs c0 of these grooves will preferably berounded. The tops may be horizontal or slightly inclined downwardlytoward the center of the chamber and the front edges a of the ribsseparating the grooves maybe vertical or otherwise.

The chamber A is provided with a central tubular hub a, which is fittedto an upright shaft B that may besustained in bearings in any suitablemanner. This shaft is repre sented as being shouldered above the hub aand as having a nut applied to it below said hub. Between the hub 00 andthe cylindric lower portion, a, of the chamber A horizontal arms (L15extend, and these form theconnection between the hub and the chamber.Preferably their upper surfaces will be in clined so as to shed materialfalling upon them. Obviously the space between the hub and the cylindriclower portion of the cham her will be annular except where it istraversed by these arms. The upper surface, a, of the chamber isinclined downwardly toward the center of the chamber.

The upper part of the chamber A is surrounded by a stationary shell ordeflector O, which may be supported in any suitable manner and on theupper end extends inwardly a slight distance above the outer portion ofthe top surface, a, of the chamber A.

Below the shell or deflector O is another shell 0, and below this shell0 is a chamber or box D having an inclined gutter cl and a door d on thefront, the latter preferably being removable to facilitate cleaning outthe box.

Below the lower cylindric portion, a, of the chamber A is a shell E,which is fixed in an opening formed in the bottom of the box D. Beneaththis opening is a chute F for the purpose of carrying away concentratesdischarged from the chamber.

The chamber A is caused to rotate at a high velocity by imparting rotarymotion to its supporting-shaft. Pulverized ore or pulp is introducedinto the chamber by a chute G, (indicated by dotted lines,) so that itwill fall upon the lower part, of the acutely-inclined portion a of thechamber. The high speed of the chamber causes the pulp to spread outequally in a film over this part of the chamber, and instantly ittravels outwardly and up over the riffles a to the grooves a In passingover the riffies the effect of change of position of the particles is topermit the heavier to move toward and hug the inner surface of thechamber. The material passes upward beyond the riffles, the heavier,still hugging the surface of the chamber, being caused to move upwardand outward. The inclined bottoms of the grooves a facilitate theheavier particles remaining in contact with the chamber and enable themby accumulation in the grooves a to displace the lighter partioles. Thelighter particles, with the water which is used in concentrating, passto the top of the chamber and over the inclined surface a to thedeflector C, whence they pass to the box D and are discharged.

The course of the material within the chamber A is indicated by dottingin Fig. 1.

After the grooves 0 have become overcharged with concentrates theoperation may be stopped, and then the concentrates may be washed out ofthe grooves by means of a stream of water escaping from a pipe, directedby the attendant. Vhen thus removed, they pass downwardly through thechamber on the chute F to any suitable receptacle.

lVhat I claim as my invention, and desire to secure by Letters Patent,is

1. An oreconcentrator consisting of a chamber rotating about a verticalaxis and constructed to freely permit the flow of a liquid from itscentral to its peripheral portion, the chamber comprisinga lowerportionformin g a discharge for the concentrate, an upper portion provided witha number of grooves arranged one above the other and the distance fromthe axis of the chamber to the bottom of each groove increasing frombelow, upward, and a connecting portion joining the upper and lowerportions of the chamber, sub- JOHN B. XVARTNG. Vitnesses ANTHONY GREF,S. A. PALMER.

